Residential delivery area · Montana
ZIP Code 59270: Sidney, MT
ZIP code 59270 uses the postal name Sidney, Montana and lies mostly in Richland County (60% of its land) with the rest in McKenzie County (Census 2020 ZIP-county file). About 8,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $72,630 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Sidney; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Sidney · its only residential ZIP
- County
- Richland County (60%); McKenzie County (40%)
- Census places
- Sidney
- House districts
- MT-2 (60%), ND at large (40%) 119th Congress, by share of land
- State
- Montana
- Time zone
- Mountain
- Land area
- 891.0 sq mi · 10 people per sq mi
Where is ZIP code 59270?
59270 centers on 47.609°, -104.086° and covers 891.0 square miles of land plus 8.7 of water. It borders 11 ZIP codes: 59217, 58838, 59221, 59262, 58831, 59243, 58835, 58621, 58634, 59218 and more.
The map draws ZIP code areas only. For the streets inside 59270, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 59270 compare with the rest of Richland County?
| Measure | 59270 | In Richland County | In MT |
|---|---|---|---|
| People (ACS 2020-2024) | 8,571 | 1st of 9 | 32nd of 369 |
| Median household income | $73k | 1st of 2 | 46th of 104 |
| Median home value | $268k | 1st of 3 | 78th of 120 |
Its median household income is higher than in 51% of U.S. residential ZIP codes, and it is denser than 16% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 59270?
The 2020 Census counted 8,633 people in 59270; the ACS, which samples households over 2020-2024, estimates 8,571. Between the 2010 and 2020 censuses its population grew 17.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 8,571
- 2020 Census count
- 8,633+17.6% since 2010 (7,339)
- Households
- 3,420
- Median age
- 39.6
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 59270?
Of the 8,571 people the ACS estimates in 59270, 24.5% are under 18 and 17.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (86.4%).
- Under 1824.5%
- 18 to 6458.2%
- 65 and older17.3%
- White, not Hispanic86.4%
- Hispanic or Latino6.8%
- Other or two or more6.5%
- Asian, not Hispanic0.3%
- Black, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 59270 earn?
Median household income is $72,630 (ACS 2020-2024). It is not measurably different from 2015-2019 ($80,338 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $72,630±$12,439
- Income per person
- $45,607
- Below the poverty line
- 6.2%
- Unemployed (of the labor force)
- 2.7%
- Adults 25+ with a bachelor's degree
- 22.3%
- Adjusted gross income per tax return, 2022
- $84,9694,090 returns; wages 69% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 59270?
FHFA's house price index for 59270, built from repeat sales and appraisals of the same homes, rose 26% from 2015 to 2025 and rose 27% from 2020 to 2025, and moved +7.9% in 2025.
- Median home value (owners' estimate)
- $267,600
- Median gross rent
- $938
- Homes owned by their occupants
- 63.8%
- Housing units
- 4,294
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 59270?
416 business establishments had a location in this ZIP code in 2023, 5 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction51
- Retail trade46
- Other services (except public administration)40
- Accommodation and food services39
- Transportation and warehousing38
- Health care and social assistance34
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 59270?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 59217 | Crane | 171 | $79k | 7.4 mi |
| 58838 | Cartwright, ND | 252 | $59k | 14.0 mi |
| 59221 | Fairview | 1,951 | $77k | 20.4 mi |
| 59262 | Savage | 737 | $76k | 20.9 mi |
| 58831 | Alexander, ND | 1,089 | $98k | 26.3 mi |
| 59243 | Lambert | 446 | $84k | 29.4 mi |
| 58835 | Arnegard, ND | 839 | $138k | 30.9 mi |
| 58621 | Beach, ND | 1,161 | $67k | 34.4 mi |
| 58634 | Grassy Butte, ND | 402 | $158k | 35.6 mi |
| 59218 | Culbertson | 898 | $99k | 37.3 mi |
| 59353 | Wibaux | 1,204 | $68k | 45.5 mi |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.